Anti-slip device for fitness expander

ABSTRACT

A fitness expander includes at least two through holes positioned on the two handles respectively, a metal fastening ring is arranged on the through hole, a hollow hose with two anti-slip devices on each of the distal ends thereof is inserted through the metal fastening rings. The present invention features on that the anti-slip device is a soft and hollow cone on whose circumference a plurality of thin and elastic rings are mounted at regular clearance. While the hollow hose is pulled, the elastic rings of the anti-slip device are deformable for expanding the contact surface of the hollow hose with the fastening ring so as to avoid the abrasion of the hollow hose by metal fastening rings.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a fitness expander, especiallyone having a plurality of hollow hose with anti-slip device thereinarranged between two handles. The anti-slip device is composed of a softand hollow cone with a plurality of elastic rings so as to make theanti-slip device contact the hollow hose in a certain area while beingexpanded for preventing the hollow hose from abrasion and slipping away.

[0003] 2. Description of the Prior Art

[0004] Conventional fitness equipment for training chest muscle includesman-sized equipment with adjustable load or undersized equipment such asfitness expander with springs. For home fitness, people tend to use thefitness expander having a plurality of springs arranged between twohandles. By pulling two ends of the fitness expander, the finestpectoral workout is available.

[0005] However, the conventional fitness expander occupies quite largespace because the springs are not foldable. It's also quite heavy.Moreover, the sweat with salt produced during exercise is easy to makethe surface of the springs rusty. The inner surface of the spring isalso difficult to maintain thus cause inconvenience.

[0006] Refer to FIG. 8, the spring is replaced by a hollow hose. Thedevice includes two handles (a), each having at least two holes (a1), ametal fastening ring (b) is positioned on the hole (a1). A hollow hose(c) is inserted through and connected between the two metal fasteningrings (b) on the handles (a) respectively, and an anti-slip ball (d) ispositioned on each of two ends of the hollow hose (c) for fixing thehollow hose (c) on the handles (a) by the anti-slip ball (d) leaningagainst the metal fastening ring (b), as shown in FIG. 9.

[0007] However, when the hollow hose (c) is pulled and extended, thediameter thereof is contracted so that the anti-slip ball (d) make thestretching area on the outer surface of the distal end of the hollowhose (c) contact the metal fastening ring (b) in circular line, as shownin FIG. 10. While when the hollow hose (c) is loosened, it turns back tothe original length. During the process of contraction and stretch, theextended area on the outer surface of the distal end of the hollow hose(c), contact with the metal fastening ring (b), is easy to be worn-out.When being abraded in a certain degree, the hollow hose (c) breaks off.This causes users accidental harms.

[0008] Moreover, refer from FIG. 11 to FIG. 13, even a prior art havinga cylindrical anti-slip device (f), a rivet-like anti-slip device (g) orI-shaped anti-slip device (h) instead of the anti-slip ball (d), theproblem of worn-out of hollow hose (c) by the anti-slip devices stillexists. There is still a need for improvement.

SUMMARY OF THE INVENTION

[0009] It is therefore a primary object of the present invention toprovide a fitness expander having a plurality of hollow hose with twoanti-slip devices on two distal ends of the hollow hose, disposedbetween the two handles. The anti-slip device is a soft and hollow conewith a plurality of and elastic rings thereon so that the contact of theanti-slip device with the hollow hose forms a plane while the hollowhose is stretched.

[0010] Thus the abrasion of the hollow hose by the anti-slip device canbe avoided.

BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accomplishment of the above-mentioned object of the presentinvention will become apparent from the following description and itsaccompanying drawings which disclose illustrative an embodiment of thepresent invention, and are as follows:

[0012]FIG. 1 is a front view of the present invention;

[0013]FIG. 2 is a perspective view of the present invention;

[0014]FIG. 3 is a cross-sectional view of the present invention notbeing put on loading;

[0015]FIG. 4 is a cross-sectional view of the present invention whilebeing put on loading;

[0016]FIG. 5 is another embodiment of a anti-slip device in accordancewith the present invention;

[0017]FIG. 6 is a cross-sectional view of another embodiment of thepresent invention not being put on loading;

[0018]FIG. 7 is a cross-sectional view of another embodiment of thepresent invention while being put on loading;

[0019]FIG. 8 is a front view of a prior art;

[0020]FIG. 9 is a cross-sectional view of the prior art not being put onloading;

[0021]FIG. 10 is a cross-sectional view of the prior art while being puton loading;

[0022]FIG. 11 is a cross-sectional view of another prior art;

[0023]FIG. 12 is a cross-sectional view of a further prior art;

[0024]FIG. 13 is a cross-sectional view of a further prior art.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0025] Refer to FIG. 1, the present invention having two handles 1, eachwith at least two through holes 11, a metal fastening ring 2 clipped andpositioned on the through hole 11, a hollow hose 3 inserted through thetwo corresponding metal fastening rings 2 on each of the handle 1, twoanti-slip devices 4 mounted in the two distal ends of the hollow hose 3for extending the hollow hose 3 and leaning on the metal fastening ring2. This make the two ends of the hollow hose 3 being fixed firmly on theeach of the handles 1 respectively. The present invention features onthat the anti-slip device 4 is made of soft material and is a hollowcone 41 with a plurality of thin and elastic rings 42 disposed on thecircumference thereof. Refer to FIG. 2 & FIG. 3, when the hollow hose ispulled, each of the thin and elastic rings 42 deforms and contacts theinner face of the hollow hose 3. The contact area between the hollowhose 3 and the metal fastening ring 2 is not a circular line but aplane, as shown in FIG. 4. Thus the hollow hose 3 will not be worn outby the metal fastening ring 2.

[0026] In accordance with the structure mentioned above, when theanti-slip device 4 is mounted inside the hollow hose 3, the two hands ofusers hold the two handles respectively without putting any loading onthe present invention and the hollow hose 3 is not stretched, each ofthe thin and elastic rings 42 on the cone 41 of the anti-slip device 4lean on the inner surface of the hollow hose 3 in parallel, as shown inFIG. 3. While the users' hands put loading on the present invention, thehollow hose 3 is pulled and the diameter thereof is shortened so thatthe anti-slip device 4 slides into the metal fastening ring 2 and eachof the thin and elastic rings 42 on the cone 41 thereof deforms andcontact the inner surface of the hollow hose 3 in a plane. Refer to FIG.4, thus the contact of the hollow hose 3 with the metal fastening ring 2also forms a plane. And the hollow hose 3 is fixed firmly on the metalfastening rings 2 of the handles 1 by the cone 41 of the anti-slipdevice 4. Therefore, when the hollow hose 3 is stretched or contractedby loading, the friction due to the siding between the hollow hose 3 andthe metal fastening rings 2 can be reduced so as to avoid the worn-outand the breakage of the hollow hose 3.

[0027] Refer to FIG. 5, the anti-slip device 4 a can be designed to havetwo small cones 41 a, positioned opposite to each other. Thus theanti-slip device 4 a can be mounted into the hollow hose 3bi-directional for convenient assembling. The two ends of the hollowhose 3 is connected together to form a loop, as shown in FIG. 6 and FIG.7. This is another embodiment of the present invention.

[0028] It should be noted that the above description and accompanyingdrawings are only used to illustrate some embodiments of the presentinvention, not intended to limit the scope thereof. Any modification ofthe embodiments should fall within the scope of the present invention.

What is claimed is:
 1. A fitness expander comprising two handles, atleast two through holes are arranged on the two handles respectively,corresponding to each other, a metal fastening ring is positioned oneach of the through hole, a hollow hose is inserted through the throughholes with an anti-slip device mounted on each of the two distal ends ofthe hollow hose; the hollow hose is expanded by the anti-slip device andis leaning on the metal fastening ring for being fixed on the handle;wherein the present invention is characterized in that: the anti-slipdevice is a soft and hollow cone with a plurality thin and elastic ringsmounted on the circumference thereof; while the hollow hose is pulled,the thin and elastic rings of the anti-slip device deform and contactthe inner surface of the hollow hose in a plane so as to avoid theworn-out of the hollow hose caused by the metal fastening ring.
 2. Thefitness expander as claimed in claim 1, wherein the cone of theanti-slip device having two small cones arranged in opposite position.